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X40430S14I-C Datasheet(PDF) 4 Page - Xicor Inc.

Part # X40430S14I-C
Description  4kbit EEPROM, Triple Voltage Monitor with Integrated CPU Supervisor
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Manufacturer  XICOR [Xicor Inc.]
Direct Link  http://www.xicor.com
Logo XICOR - Xicor Inc.

X40430S14I-C Datasheet(HTML) 4 Page - Xicor Inc.

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X40430/X40431 – Preliminary Information
Characteristics subject to change without notice.
4 of 24
REV 1.2.3 11/28/00
www.xicor.com
Low Voltage VCC (V1 Monitoring)
During operation, the X40430 monitors the VCC level
and asserts RESET if supply voltage falls below a pre-
set minimum VTRIP1. The RESET signal prevents the
microprocessor from operating in a power fail or
brownout
condition.
The
RESET/RESET
signal
remains active until the voltage drops below 1V. It also
remains active until VCC returns and exceeds VTRIP1
for tPURST.
Low Voltage V2 Monitoring
The X40430 also monitors a second voltage level and
asserts V2FAIL if the voltage falls below a preset mini-
mum VTRIP2. The V2FAIL signal is either ORed with
RESET to prevent the microprocessor from operating
in a power fail or brownout condition or used to inter-
rupt the microprocessor with notification of an impend-
ing power failure. The V2FAIL signal remains active
until the V2MON drops below 1V (V2MON falling). It
also remains active until V2MON returns and exceeds
VTRIP2 by 0.2V.
Low Voltage V3 Monitoring
The X40430 also monitors a third voltage level and
asserts V3FAIL if the voltage falls below a preset mini-
mum VTRIP3. The V3FAIL signal is either ORed with
RESET to prevent the microprocessor from operating
in a power fail or brownout condition or used to inter-
rupt the microprocessor with notification of an impend-
ing power failure. The V3FAIL signal remains active
until the V3MON drops below 1V (V3MON falling). It
also remains active until V3MON returns and exceeds
VTRIP3 by 0.2V.
Early Low VCC Detection (LOWLINE)
This CMOS output goes LOW earlier than RESET/
RESET whenever VCC falls below the VTRIP1 voltage
and returns high when VCC exceeds the VTRIP1 volt-
age. There is no power up delay circuitry (tPURST) on
this pin.
Figure 2. Two Uses of Multiple Voltage Monitoring
Unreg.
Supply
VCC
5V
Reg
V2MON
X40430
Resistors selected so 3V appears on V2MON when unregulated
supply reaches 6V.
Unreg.
Supply
VCC
X40431
RESET
V2FAIL
System
VCC
Reset
RESET
V2FAIL
System
Reset
Notice: No external components required to monitor three voltages.
R
R
V3MON
V3FAIL
V2MON
V3MON
V2MON
5V
Reg
4V
Reg
3V
Reg
V2MON


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